In a video taken at their On the Run Tour II kickoff show on Wednesday in Cardiff, U.K., both musicians can be seen on a screen in all-white attire joined by 6-year-old daughter Blue Ivy and 11-month-old twins Rumi and Sir for what appeared to be a vow renewal ceremony.
The message “THIS IS REAL LOVE” is projected during the film at the concert as the power couple sings their 2009 duet “Young Forever.” In April, they celebrated their 10-year anniversary together.
Before Bey and Jay shared the footage of the ceremony, photos of the pair holding two babies was shared along with the words “LOVE IS UNIVERSAL” and “LOVE NEVER CHANGES.” The Bey Hive presumably thought the children are Rumi and Sir (who will celebrate their first birthday on June 13), however, the babies are not.
“At the end of the show the Carter babies were included in a family collage [however] the babies in the film clip at the beginning were not their children,” a source tells PEOPLE.
Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Babies newsletter.
Despite this, the stand-in babies had twitter is ablaze with excitement.
“Rumi and Sir Carter debut on #OTRII!,” tweeted one account, while another wrote, “THE TWINS. GEMINI LEGENDS.”
Fans first saw the twins one month after their birth, in a family portrait featuring the proud mom holding her babies and introducing them to the world.
“Sir Carter and Rumi 1 month today,” Beyoncé, 36, captioned the image — the style of which was reminiscent of her double baby announcement the previous February.